.back-to-top {
	display: none;
	position: fixed;
    width: 1.2rem;
    height: 1.2rem;
    right: 0.3rem;
    bottom: 2rem;
    border-radius: 100%;
    background: url("../images/pages/top.png") center center;
    background-size: 100% 100%;
    z-index: 20;
    opacity: 0;
}

.back-to-top.active {
    display: block;
    opacity: 1;
    transition: opacity .3s ease-in;
}